It is difficult, on past experience, to be persuaded by the UDA's pledge of good behaviour. But by threatening to declare the Ulster Defence Association's cease fire inoperative, the Northern Ireland Secretary, Dr John Reid, has sent a strong message to all who believe that the distinction between paramilitarism and democracy can still be fudged.
It has been clear as nightly violence has mounted in Belfast over recent weeks, that malign forces - principally loyalist - were orchestrating events. This week has seen what security sources described as the worst rioting in 10 years in some areas. Live semi-automatic rounds were fired, blast bombs and petrol bombs were used. And - as ever - large numbers of young people were thrust into the front line of rioting by those behind the scenes.
Less spectacularly but more lethally, the UDA and its associates, using various noms de guerre, have sustained an insidious bombing campaign, using pipe bombs and other devices, over months. Individual and homes have been targeted on a purely sectarian basis. An incendiary car bomb placed at the Lammas Fair in August would have caused extensive loss of life had it not been located and dealt with by the security forces.
Dr Reid called a press conference yesterday in Belfast at which he intended to "specify" the UDA. Apparently word of his intentions concentrated minds and the UDA signalled its decision to call a halt to violence. But few will dissent from the Secretary of State's expressed scepticism. He will judge the UDA by what happens on the ground each night from now on, he said. If its street violence continues or if the pipe-bombing resumes, he will proceed to "specify" the organisation. Members will be subject to arrest. Many will return to prison.
It is a scenario that nobody can welcome. With the political process teetering on the brink of collapse, the paramilitaries will inevitably sense the emergence of a vacuum which they can fill. The Chief Constable, Mr Ronnie Flanagan, has called for politicians and ordinary citizens to "show some passion for peace". That call should be heeded. The Secretary of State has shown strength and it has yielded results. In the new climate which has followed the attacks in America those who stand up against terror - in any form - can be more sure of support.